I'm going to look for a used 550Ti to throw in a rig somewhere in my house. It should be good for 12K PPD, right?

the most recent GTX 550 Ti I owned, the EVGA model, was doing around 9k PPD, only high value WU were coming in, at 2510 points or 5187 points. On the same units the GTX 470 was doing around 12k PPD. So don't keep your hopes too high. GTX 550 Ti is a weird chip for GPU folding, me I had a lot of issues with them, had 3 before giving up on them completely, all of them experiencing the same issues, I would not recommend them for folding, you might want to go with a GTS 450 instead.

Have a few parts available to our folding community if needed, XFX core edition 750 watt PSU, modded GTX 480 with kuhler 620 mounted to the core (load temp is now 53C) few HDD's, a 60GB SSD. Anyone needs a part to get up and folding let me know.